This Kind of structure has a lengthy historical past at Patek, dating again for the early 1960s with the ref. 2597 Travel Time Calatrava. As James Stacey outlined in his Fingers-On Together with the 5164R in 2019, the movement inside the 2597 originated from your mind of Louis Cottier – https://www.watchesworld.com/germanys-top-10-favourite-luxury-watches/